Q: Which formula correctly represents the hydrolysis of ATP during muscle contraction?

$$\mathrm{ATP} + \mathrm{H}_2\mathrm{O} \rightarrow \mathrm{ADP} + \mathrm{P}_i + \text{energy}$$

Question 1

Which of the following statements correctly differentiates between the three types of muscle tissue?

Accepted Answer

Skeletal muscle is voluntary, cardiac muscle is involuntary, and smooth muscle is involuntary.

Question 2

During muscle contraction, calcium ions play a critical role. Which of the following best describes their function?

Accepted Answer

Calcium binds to troponin, causing tropomyosin to expose binding sites on actin.

Question 3

Which sequence correctly describes the structural relationship from largest to smallest in skeletal muscle?

Accepted Answer

Muscle fibers → Myofibrils → Myofilaments

Question 4

When an action potential reaches the synaptic bulb, which is the correct order of events?

Accepted Answer

Action potential arrival → Calcium influx → Vesicle fusion → Neurotransmitter release

Question 5

Which of the following is NOT a source of ATP production in skeletal muscle cells?

Accepted Answer

Lactic acid fermentation

Question 6

Which of the following is the correct sequence of the five interrelated steps in the muscle contraction cycle?

Accepted Answer

ATP hydrolysis → Cross-bridge formation → Power stroke → Detachment → Reactivation of myosin

Question 7

Which of the following is NOT a structural component of a typical neuron?

Accepted Answer

Myofibril

Question 8

A neuron with one axon and multiple dendrites is classified as which structural type?

Accepted Answer

Multipolar

Question 9

Which of the following best describes the primary function of the sympathetic division of the autonomic nervous system?

Accepted Answer

Stimulates 'fight or flight' responses such as increased heart rate and pupil dilation

Question 10

Which neuron type is responsible for transmitting impulses from sensory receptors to the central nervous system?

Accepted Answer

Sensory neurons

Question 11

Which statement best compares the controlling mechanisms of the nervous system and the endocrine system?

Accepted Answer

The nervous system uses electrical impulses for rapid, short-term control; the endocrine system uses hormones for slow, long-lasting control.

Question 12

Which of the following correctly identifies the two lobes of the pituitary gland and their cellular sources?

Accepted Answer

Anterior lobe (adenohypophysis) from glandular cells; posterior lobe (neurohypophysis) from neural tissue

Question 13

Which pituitary hormone targets the kidneys to regulate water balance?

Accepted Answer

Antidiuretic hormone (ADH)

Question 14

A patient is experiencing increased heart rate, dilated pupils, and decreased digestive activity. Which division of the autonomic nervous system is most active?

Accepted Answer

Sympathetic division

Question 15

Which formula correctly represents the hydrolysis of ATP during muscle contraction?

Accepted Answer

$$\mathrm{ATP} + \mathrm{H}_2\mathrm{O} ightarrow \mathrm{ADP} + \mathrm{P}_i + 	ext{energy}$$

Question 16

Which hormone is secreted by the anterior pituitary and stimulates the adrenal cortex?

Accepted Answer

Adrenocorticotropic hormone (ACTH)

Question 17

Which of the following scenarios best illustrates the application of the parasympathetic division?

Accepted Answer

A person relaxing after a meal experiences increased digestive activity and decreased heart rate.

Question 18

Which of the following neurons is most likely to be found in the retina and is responsible for transmitting visual information?

Accepted Answer

Bipolar neuron

Question 19

Which pituitary hormone stimulates milk production in mammary glands?

Accepted Answer

Prolactin

ANP Study Guide: Muscle and Nervous System Review

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