When myosin heads form cross-bridges during muscle contractions, they bind to binding sites found on _____, a component of thin filaments.
a. myosin
b. actin
c. intrafusal
d. extrafusal
e. myofibril
Answer: b. actin
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Match the following:
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The tubercle of rib 4 articulates with the transverse costal facet of T3
Indicate whether this statement is true or false.
The midpiece of the sperm tail contains mostly ________
Fill in the blanks with correct word
What are two benefits of having a portal system that connects the hypothalamus with the anterior pituitary gland? Are there any other endocrine axes connected by a portal system?
What will be an ideal response?