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Ch. 9 Muscles and Muscle Tissue
Marieb - Human Anatomy & Physiology 11th Edition
Marieb, Hoehn11th EditionHuman Anatomy & PhysiologyISBN: 9780136874034당신이 사용하는 게 아니라요?교과서 변경
모든 교과서Marieb, Hoehn 11th EditionCh. 9 Muscles and Muscle Tissue문제 10
9장, 문제 10

The neurotransmitter released by somatic motor neurons is:
a. Acetylcholine
b. Acetylcholinesterase
c. Norepinephrine

검증된 단계별 안내
1
Understand the role of somatic motor neurons: These neurons control voluntary muscle movements by transmitting signals to skeletal muscles.
Recall the neurotransmitters involved in the nervous system: Acetylcholine (ACh) is commonly associated with muscle activation, while norepinephrine is more related to the autonomic nervous system.
Identify the neurotransmitter released at the neuromuscular junction by somatic motor neurons, which is responsible for stimulating skeletal muscle contraction.
Differentiate between acetylcholine and acetylcholinesterase: acetylcholine is the neurotransmitter, whereas acetylcholinesterase is the enzyme that breaks down acetylcholine after its action.
Conclude that the neurotransmitter released by somatic motor neurons is acetylcholine.

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주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Somatic Motor Neurons

Somatic motor neurons are nerve cells that control voluntary muscle movements by transmitting signals from the central nervous system to skeletal muscles. They play a key role in conscious motor control and reflexes.
추천 영상:
04:20
The Neuron

Neurotransmitters

Neurotransmitters are chemical messengers that transmit signals across synapses from neurons to target cells. Different neurotransmitters have specific roles; for example, acetylcholine is commonly involved in muscle activation.
추천 영상:
2:30
Neurotransmitter Receptors

Acetylcholine and Acetylcholinesterase

Acetylcholine is the primary neurotransmitter released by somatic motor neurons to stimulate muscle contraction. Acetylcholinesterase is an enzyme that breaks down acetylcholine in the synaptic cleft, terminating the signal and allowing muscle relaxation.
추천 영상:
3:26
Steps of Muscle Contraction Example 3
관련 실천
교과서 질문

A smooth, sustained contraction resulting from very rapid stimulation of the muscle, in which no evidence of relaxation is seen, is called:

a. A twitch

b. Temporal summation

c. Multiple motor unit summation

d. Fused tetanus

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교과서 질문

Aerobic exercise results in all of the following except:

a. More capillaries surrounding muscle fibers

b. More mitochondria in muscle cells

c. Increased size and strength of existing muscle cells

d. More myoglobin

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교과서 질문

Characteristics of isometric contractions include all but:

a. Shortening

b. Increased muscle tension throughout the contraction phase

c. Absence of shortening

d. Used in resistance training

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교과서 질문

Myoglobin has a special function in muscle tissue. It:

a. Breaks down glycogen

b. Is a contractile protein

c. Holds a reserve supply of oxygen in the muscle

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교과서 질문

The ions that enter the skeletal muscle cell during the generation of an action potential are

a. Calcium ions

b. Chloride ions

c. Sodium ions

d. Potassium ions

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교과서 질문

During muscle contraction, ATP is provided by:

a. a coupled reaction of creatine phosphate with ADP

b. aerobic respiration of glucose, and

c. anaerobic glycolysis.

______ (1) Which provides ATP fastest?

______  (2) Which does (do) not require that oxygen be available?

______  (3) Which provides the highest yield of ATP per glucose molecule?

______  (4) Which results in the formation of lactic acid?

______  (5) Which has carbon dioxide and water products?

______  (6) Which is most important in endurance sports?

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