When Jacob starts running, his legs move faster and his heart rate increases. Which types of muscles are involved in these changes?

Question

Skeletal muscles control his leg movement and smooth muscles control his heart rate.
Skeletal muscles control his leg movement and cardiac muscles control his heart rate.
Smooth muscles control his leg movement and cardiac muscles control his heart rate.
Skeletal muscles control both his leg movement and heart rate.

2. Which protects nerve endings at the ends of fingers and toes?

joints
hair
nails
muscle

3. Which trait do cardiac and smooth muscle share?

voluntary
involuntary
nonstriated
striated

4. When a person looks at a bright light, tiny muscles in the eye contract so less light can enter the eye.

Which are most likely the characteristics of this muscle? Select three options.

nonstriated
involuntary
voluntary
striated
attached to skull
attached to the eyeball

5. Which organs are part of the musculoskeletal system? Select three choices.

bones
hair
muscles
skin
tendons
nails

6. Which is the largest organ?

sartorius
skin
hair
gluteus maximus

7. Which describes an interaction within the musculoskeletal system?

When a muscle contracts, a bone will move.
When a bone contracts, a muscle will move.
When a tendon contracts, a ligament will move.
When a ligament contracts, a tendon will move.

8. To raise an arm upward, the muscle on one side of it contracts.

What happens to the muscle on the opposite side of the arm?

contracts
relaxes
both contracts and relaxes
neither contracts nor relaxes

9. The picture represents muscle tissue.Thin layers of muscle tissue, each with a nucleus.Which type of muscle tissue is pictured?cardiac skeletal smooth striated

10. Which action would be completed by skeletal muscle tissue?

digesting lunch
moving blood through arteries
increasing the heartbeat
kicking a soccer ball

Answer 1

Here are the answers to your questions:

1. When Jacob starts running, his legs move faster and his heart rate increases. Which types of muscles are involved in these changes?
   Answer: Skeletal muscles control his leg movement and cardiac muscles control his heart rate.

2. Which protects nerve endings at the ends of fingers and toes?
   Answer: nails

3. Which trait do cardiac and smooth muscle share?
   Answer: involuntary

4. When a person looks at a bright light, tiny muscles in the eye contract so less light can enter the eye. Which are most likely the characteristics of this muscle? Select three options.
   Answer:

   • nonstriated
   • involuntary
   • attached to the eyeball

5. Which organs are part of the musculoskeletal system? Select three choices.
   Answer:

   • bones
   • muscles
   • tendons

6. Which is the largest organ?
   Answer: skin

7. Which describes an interaction within the musculoskeletal system?
   Answer: When a muscle contracts, a bone will move.

8. To raise an arm upward, the muscle on one side of it contracts. What happens to the muscle on the opposite side of the arm?
   Answer: relaxes

9. The picture represents muscle tissue. Thin layers of muscle tissue, each with a nucleus. Which type of muscle tissue is pictured?
   Answer: smooth

10. Which action would be completed by skeletal muscle tissue?
    Answer: kicking a soccer ball

Feel free to ask if you have further questions or need clarifications!

Answer 2

Which substances do cells need to produce energy? Check all that apply.

oxygen
water
carbon dioxide
sun’s energy
sugar molecules

Answer 3

To produce energy, especially through the process of cellular respiration, cells typically require the following substances:

• Oxygen: Needed for aerobic respiration.
• Sugar molecules: These provide glucose, which is a primary source for energy production during cellular respiration.

Water can also be involved in metabolic processes, but it is not a direct energy source in the same way that oxygen and sugar are.

Carbon dioxide is a byproduct of cellular respiration rather than a necessary input.

Sun's energy is needed for photosynthesis, which is how plants produce energy but is not needed for cellular respiration in animal cells.

So, the substances you should check are:

• Oxygen
• Sugar molecules
• Water (optional, as it's not directly used for energy production but is involved in the processes)

If the focus is strictly on substances needed for energy production, you should primarily check oxygen and sugar molecules.

Answer 4

oxygen and sugar molecules.

Which action is one of the main functions of the circulatory system?

delivering substances to the cells of the body
producing substances in the cells of the body
breaking down substances in the cells of the body

Answer 5

The correct answer is:

delivering substances to the cells of the body.

This is one of the main functions of the circulatory system, as it transports oxygen, nutrients, hormones, and other essential substances to cells throughout the body while also helping to remove waste products.