Which component of nerve cells contains the nucleus? (1 point)

cell body

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 contract.

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

Iris

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 slows down to preserve heat.

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.

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 maintain internal stability.

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

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 work together to do a specific job

Which is most complex?(1 point)

Responses

cells
cells

organ system
organ system

organs
organs

tissues

organ system

Which organ of the respiratory system is located inside the lungs?(1 point)

Responses

bronchioles
bronchioles

nasopharynx
nasopharynx

trachea
trachea

larynx

bronchioles

Which organ in the excretory system filters blood?(1 point)

Responses

kidney
kidney

bladder
bladder

ureter
ureter

urethra

kidney

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

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.

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