Question

question 13 1 pts a contraction in which the tension within the muscle remains the same but the length changes is called a(n) _____ contraction. tonic isotonic isometric tetanic question 14 1 pts an example of a hinge joint is(are) the: head of the radius articulating with the ulna. interphalangeal joints. first metacarpal articulating with the trapezium. head of the humerus articulating with the scapula. question 15 1 pts the lactate produced by anaerobic respiration is converted back to glucose in the: lungs. liver. mitochondria. sarcoplasmic reticulum.

Explanation:

• Question 13: In an isotonic contraction, muscle tension remains constant while the length changes. Tonic contractions are related to maintaining posture, isometric contractions have constant length and changing tension, and tetanic contractions are a type of sustained contraction.
• Question 14: Interphalangeal joints (joints between the phalanges of the fingers and toes) are hinge - joints, allowing movement in one plane. The head of the radius articulating with the ulna is a pivot joint, the first metacarpal articulating with the trapezium is a saddle joint, and the head of the humerus articulating with the scapula is a ball - and - socket joint.
• Question 15: The Cori cycle involves the conversion of lactate produced by anaerobic respiration in muscles back to glucose in the liver. Lungs are for gas exchange, mitochondria are the sites of aerobic respiration, and the sarcoplasmic reticulum is involved in muscle contraction and calcium storage.

Answer:

Question 13: B. isotonic
Question 14: B. interphalangeal joints
Question 15: B. liver