Lungs expel waste from the body in the form of (1 point)

Responses

oxygen.
oxygen.

carbon dioxide.
carbon dioxide.

water.
water.

blood cells.
blood cells.

41 answers

carbon dioxide.
Which option is single celled? (1 point)
Responses

a bacterium
a bacterium

an artery
an artery

a human
a human

a kidney
a kidney
a bacterium
Which vessel carries oxygenated blood to the heart?(1 point)
Responses

vena cava
vena cava

pulmonary vein
pulmonary vein

aorta
aorta

pulmonary artery
pulmonary artery
pulmonary vein
A patient has a condition that makes it difficult to absorb nutrients from food. Which organ is most likely affected by the condition?(1 point)
Responses

large intestine
large intestine

small intestine
small intestine

stomach
stomach

esophagus
small intestine
When you experience changes in light, sound, and temperature, which cells send signals toward the central nervous system? (1 point)
Responses

motor neurons
motor neurons

sensory neurons
sensory neurons

axons
axons

dendrites
sensory neurons
Which sensory receptors would allow you to tell the difference between sweet and sour?(1 point)
Responses

thermoreceptors
thermoreceptors

mechanoreceptors
mechanoreceptors

chemoreceptors
chemoreceptors

photoreceptors
photoreceptors
chemoreceptors
A patient is unable to tell the difference between red and green. Which receptors are probably not functioning properly in the patient?(1 point)
Responses

Krause's corpuscles
Krause's corpuscles

Merkel's disks
Merkel's disks

rods
rods

cones
cones
Most of the inside of the eye is known as the vitreous body. It is made primarily of vitrosin, a form of collagen. Collagen helps make up tendons, skin, and ligaments. This implies that, by volume, the eye is mostly made of what type of tissue?(1 point)
Responses

muscle
muscle

epithelial
epithelial

connective
connective

nerve
nerve
connective
Which statement correctly describes how we maintain homeostasis when we are tired? (1 point)
Responses

Our nervous system stops moving muscles.
Our nervous system stops moving muscles.

Our muscles send us a signal to stop moving.
Our muscles send us a signal to stop moving.

Our muscles weaken and move slowly.
Our muscles weaken and move slowly.

Our nervous system sends us a signal to rest.
Our nervous system sends us a signal to rest.
Which body system is responsible for sending signals that your body is not in homeostasis? (1 point)
Responses

the circulatory system
the circulatory system

the respiratory system
the respiratory system

the nervous system
the nervous system

the muscular system
the muscular system
the nervous system
Which cells carry nutrients from food to the rest of the cells in the body?(1 point)
Responses

nerve cells
nerve cells

blood cells
blood cells

muscle cells
muscle cells

stomach cells
stomach cells
Question 2
How are blood cells and stomach cells similar?(1 point)
Responses

Both secrete enzymes.
Both secrete enzymes.

Both help with digestion.
Both help with digestion.

Both help maintain homeostasis.
Both help maintain homeostasis.

Both send signals in the body.
Both send signals in the body.
Question 3
Which option shows the correct order of organization within multicellular organisms (from least complex to most complex)?(1 point)
Responses

cell → tissue → organ → organ system → organism
cell → tissue → organ → organ system → organism

tissue → organ system → organ → organism → cell
tissue → organ system → organ → organism → cell

organ → organ system → cell → organism → tissue
organ → organ system → cell → organism → tissue

cell → organ → organ system → tissue → organism
cell → organ → organ system → tissue → organism
Question 4
Which statement is true?(1 point)
Responses

Bones are organ systems.
Bones are organ systems.

Bones provide shape to the body.
Bones provide shape to the body.

Bones help the heart pump blood.
Bones help the heart pump blood.

Bones are composed of a single layer.
Bones are composed of a single layer.
Question 5
What is systemic circulation?(1 point)
Responses

the path of blood as it moves from the heart throughout the body and back to the heart
the path of blood as it moves from the heart throughout the body and back to the heart

the path of blood between the heart and lungs
the path of blood between the heart and lungs

the path of blood as it moves from the head throughout the body and back to the head
the path of blood as it moves from the head throughout the body and back to the head

the path of blood between pharynx and trachea
the path of blood between pharynx and trachea
Question 6
Which organ in the excretory system helps get filter waste?(1 point)
Responses

ureter
ureter

urethra
urethra

bladder
bladder

kidney
kidney
Question 7
In which two organs is food broken down?(1 point)
Responses

esophagus and small intestine
esophagus and small intestine

small intestine and large intestine
small intestine and large intestine

esophagus and stomach
esophagus and stomach

mouth and stomach
mouth and stomach
Question 8
Which component of nerve cells contains the nucleus? (1 point)
Responses

axon
axon

cell body
cell body

neuron
neuron

dendrite
dendrite
Question 9
A girl has her eyes shut and is standing inside a brightly lit room. What happens to her pupils when she opens her eyes? Why?(1 point)
Responses

Her pupils grow because the muscles contract.
Her pupils grow because the muscles contract.

Her pupils grow because the muscles relax.
Her pupils grow because the muscles relax.

Her pupils shrink because the muscles contract.
Her pupils shrink because the muscles contract.

Her pupils shrink because the muscles relax.
Her pupils shrink because the muscles relax.
Question 10
The human body has four types of tissues. What part of the eye uses muscle tissue for opening and closing movements?(1 point)
Responses

Cornea
Cornea

Iris
Iris

Sclera
Sclera

Retina
Retina
Question 11
How do polar bears maintain homeostasis in freezing cold weather? (1 point)
Responses

Their metabolism slows down to preserve heat.
Their metabolism slows down to preserve heat.

They hibernate in warm areas in order to heat their bodies.
They hibernate in warm areas in order to heat their bodies.

Their thick fur retains heat.
Their thick fur retains heat.

Their metabolism speeds up to produce heat.
Their metabolism speeds up to produce heat.
Question 12
Which example shows an organism that cannot reach homeostasis through internal changes? (1 point)
Responses

A dog shivers when it is too cold.
A dog shivers when it is too cold.

Circulation decreases in a bird when it becomes too warm.
Circulation decreases in a bird when it becomes too warm.

A person gets a fever in response to a flu infection.
A person gets a fever in response to a flu infection.

A lizard is cold, and it moves to a sunny rock to warm up.
A lizard is cold, and it moves to a sunny rock to warm up.
Question 13
How is homeostasis achieved?(1 point)
Responses

Cells maintain internal stability.
Cells maintain internal stability.

Cells secrete stomach enzymes.
Cells secrete stomach enzymes.

Cells control involuntary movements.
Cells control involuntary movements.

Cells control voluntary movements.
Cells control voluntary movements.
Question 14
How are muscle cells and bone cells similar?(1 point)
Responses

Both gather information from inside and outside the body.
Both gather information from inside and outside the body.

Both make it possible for you to respond to your environment by moving.
Both make it possible for you to respond to your environment by moving.

Both control involuntary movements such as the beating of your heart.
Both control involuntary movements such as the beating of your heart.

Both release sweat when the temperature gets too warm.
Both release sweat when the temperature gets too warm.
Question 15
What is the function of an organ system? (1 point)
Responses

to be a basic unit of organization with bodies
to be a basic unit of organization with bodies

to work together to do a specific job
to work together to do a specific job

to control movement in internal organs
to control movement in internal organs

to organize a group of similar cells
to organize a group of similar cells
Question 16
Which is most complex?(1 point)
Responses

cells
cells

organ system
organ system

organs
organs

tissues
tissues
Question 17
Which organ of the respiratory system is located inside the lungs?(1 point)
Responses

bronchioles
bronchioles

nasopharynx
nasopharynx

trachea
trachea

larynx
larynx
Question 18
Which organ in the excretory system filters blood?(1 point)
Responses

kidney
kidney

bladder
bladder

ureter
ureter

urethra
urethra
Question 19
What is the term for changes in the internal or external environment that cause a response?(1 point)
Responses

signals
signals

messages
messages

nerves
nerves

stimuli
stimuli
Question 20
How do signals from sensory neurons reach motor neurons?(1 point)
Responses

Through interneurons in the brain and spinal cord that connect sensory neurons and motor neurons.
Through interneurons in the brain and spinal cord that connect sensory neurons and motor neurons.

Signals from sensory neurons do not get sent to motor neurons.
Signals from sensory neurons do not get sent to motor neurons.

Motor neurons signal for the body to move the signal toward them.
Motor neurons signal for the body to move the signal toward them.

Signals move from dendrite to dendrite towards motor neurons.
Signals move from dendrite to dendrite towards motor neurons.
Skip to navigation
Question 1: blood cells
Question 2: Both secrete enzymes.
Question 3: cell → tissue → organ → organ system → organism
Question 4: Bones provide shape to the body.
Question 5: the path of blood as it moves from the heart throughout the body and back to the heart
Question 6: kidney
Question 7: esophagus and stomach
Question 8: cell body
Question 9: Her pupils shrink because the muscles contract.
Question 10: Iris
Question 11: Their metabolism speeds up to produce heat.
Question 12: A lizard is cold, and it moves to a sunny rock to warm up.
Question 13: Cells maintain internal stability.
Question 14: Both make it possible for you to respond to your environment by moving.
Question 15: to work together to do a specific job
Question 16: organ system
Question 17: bronchioles
Question 18: kidney
Question 19: stimuli
Question 20: Through interneurons in the brain and spinal cord that connect sensory neurons and motor neurons.
Flies are scavengers and tend to break down dead organisms. Based on this information, what is a plant characteristic that would best attract flies?(1 point)
Responses

flowers that emit a sweet odor
flowers that emit a sweet odor

flowers that are light colored
flowers that are light colored

flowers that are brightly colored
flowers that are brightly colored

flowers that emit a rotten odor
flowers that emit a rotten odor
Which of the following describes fertilization? (1 point)
Responses

the process of pollen moving from place to place
the process of pollen moving from place to place

the changes that occur in organisms over time
the changes that occur in organisms over time

when an animal is attracted to a flower
when an animal is attracted to a flower

when a sperm cell and egg cell come together
when a sperm cell and egg cell come together
Specialization can be both limiting and beneficial. How would a plant species benefit from a pollinator that only visits the flowers of that plant species?(1 point)
Responses

less competition for pollinators within the species
less competition for pollinators within the species

decreased self-fertilization, allowing for greater genetic variation
decreased self-fertilization, allowing for greater genetic variation

less competition for pollinators with other species
less competition for pollinators with other species

the flowers always having a pollinator
less competition for pollinators with other species
Sometimes, plants will reward their pollinators with something that benefits them. What is an example of a plant attractant that is also a pollination reward?(1 point)
Responses

sweet odors
sweet odors

nectar
nectar

pollen
pollen

vibrant colors
nectar
According to Laozi, what is the Dao?

(1 point)
Responses

the home of the heavenly spirits

the home of the heavenly spirits

respect for authority

respect for authority

the natural way of the universe

the natural way of the universe

reverence for ancestors
the natural way of the universe
Which spirits were most important to the ancient Chinese?

(1 point)
Responses

spirits of one's ancestors

spirits of one's ancestors

evil spirits who controlled the crops

evil spirits who controlled the crops

spirits found in the natural world

spirits found in the natural world

spirits representing the Mandate of Heaven
spirits of one's ancestors
This painting shows life as it existed in China many years ago. The title of the painting is Carrying Loads of Rice to Feed His Parents. What Confucian idea does the image represent?

(1 point)
Responses

filial piety

filial piety

force of yin and yang

force of yin and yang

Legalism

Legalism

Mandate of Heaven
filial piety
Add: 1/2(x+4)+1/4(4x−2) . Answer should be in mixed number form.(1 point)
To simplify the expression 1/2(x+4) + 1/4(4x-2), we can distribute the fractions:

1/2(x) + 1/2(4) + 1/4(4x) - 1/4(2)

Simplifying further, we have:

x/2 + 2/2 + 4x/4 - 1/2

Combining like terms, we get:

x/2 + 1 + x - 1/2

Combining the x/2 and x terms, we have:

(1/2 + 1)x + (-1/2 + 1)

Simplifying, we get:

(3/2)x + 1/2
no
Apologies for the confusion. Let's simplify the expression once again:

1/2(x + 4) + 1/4(4x - 2)

First, distribute the fractions:

1/2 * x + 1/2 * 4 + 1/4 * 4x - 1/4 * 2

Simplifying:

x/2 + 2/2 + 4x/4 - 2/4

Combining like terms:

x/2 + 1 + x - 1/2

Combine the x/2 and x terms:

(1/2 + 1)x + (-1/2)

Simplifying further:

(3/2)x - 1/2

Therefore, the simplified expression is (3/2)x - 1/2.
Subtract: (3g−4)−2(3g+4)
To subtract (3g - 4) - 2(3g + 4), we need to distribute the -2 to the terms within the parentheses:

= (3g - 4) - 2 * 3g - 2 * 4
= 3g - 4 - 6g - 8
= -3g - 12

Therefore, the simplified form of (3g - 4) - 2(3g + 4) is -3g - 12.