Question 1

Which of the following is NOT one of the four traits all muscle types have in common?

Accepted Answer

Ability to secrete neurotransmitters

Question 2

A patient presents with muscle weakness and rapid fatigue. Laboratory tests reveal a deficiency in acetylcholine receptors at the neuromuscular junction. Which disease is most likely responsible for these symptoms?

Accepted Answer

Myasthenia Gravis

Question 3

During the sliding filament model of muscle contraction, which step directly follows excitation-contraction coupling?

Accepted Answer

Muscle contraction

Question 4

Which equation correctly represents the calculation of the resting membrane potential ($$V_{rest}) $$using the Nernst equation for potassium ions?

Accepted Answer

$$V_{rest} = \frac{RT}{zF} \ln \left( \frac{[K^+]_{out}}{[K^+]_{in}} \right)$$

Question 5

Which neurotransmitter is primarily responsible for stimulating skeletal muscle contraction at the neuromuscular junction?

Accepted Answer

Acetylcholine

Question 6

A patient is unable to maintain muscle contraction for more than a few seconds during exercise. Which energy source is most likely depleted first?

Accepted Answer

ATP stored in muscle

Question 7

Which of the following best describes the function of the sodium-potassium pump in neurons?

Accepted Answer

It actively transports $$3 Na$^+$$ out and $$2 K$^+ in$$, maintaining the resting membrane potential.

Question 8

Which hormone is released by the posterior pituitary and is responsible for water reabsorption in the kidneys?

Accepted Answer

Antidiuretic hormone (ADH)

Question 9

A patient with Cushing's syndrome is likely to have an excess of which hormone?

Accepted Answer

Glucocorticoids

Question 10

Which of the following is a function of the hypothalamus?

Accepted Answer

Control of vital functions such as body temperature and hunger

Question 11

Which structure is responsible for the formation of cerebrospinal fluid (CSF)?

Accepted Answer

Choroid plexus

Question 12

Which of the following best describes the difference between gray matter and white matter in the CNS?

Accepted Answer

Gray matter contains cell bodies and dendrites; white matter contains myelinated axons.

Question 13

Which equation correctly represents the calculation of cardiac output ($$CO$$)?

Accepted Answer

$$CO = HR 	imes SV$$

Question 14

Which of the following is a characteristic unique to cardiac muscle?

Accepted Answer

Intercalated discs

Question 15

A patient with Parkinson's disease is most likely to have a deficiency in which neurotransmitter?

Accepted Answer

Dopamine

Question 16

Which of the following best describes the function of the limbic system?

Accepted Answer

Control of emotions and memory formation

Question 17

Which hormone is responsible for increasing blood calcium levels by stimulating osteoclast activity?

Accepted Answer

Parathyroid hormone (PTH)

Question 18

Which of the following is a function of the sympathetic nervous system?

Accepted Answer

Dilating pupils

Question 19

Which of the following best describes the role of the Schwann cell?

Accepted Answer

Formation of myelin sheath in the peripheral nervous system

Question 20

A patient is experiencing muscle fatigue after prolonged exercise. Which of the following is most likely contributing to this condition?

Accepted Answer

Accumulation of lactic acid in muscle cells

Anatomy & Physiology Study Guide: Muscular, Nervous, and Endocrine Systems

Guida di studio - Domande di pratica

Study guide - Flashcard