Human Physiology wiz needed released from the 65. The contraction cycle is trigg

Question

Human Physiology wiz needed

released from the 65. The contraction cycle is triggered by the rise in sarcoplasmic reticulum (SR). A) Na+ C) Ca2+ D) ATP E) ADP 66. W hen a catec holamine or peptide hormone binds to receptors on the surface of a cell, A) the cell membrane becomes less permeable B) a second messenger appears in the cytoplasm. C) the cell becomes inactive. D) the hormone is transported to the nucleus where it alters the activity of DNA E) None of the answers are correct 67. The posterior pituitary gland secretes A) FSH B) TSH C) ACTH. D) ADH (Vasopressin). E) MSH. 68. Synergism occurs when A) one hormone triggers the secretion of a second hormone. B) one hormone inhibits the release of a second hormone. C) hormones working together produce a larger effect than predicted. D) hormones working together produce a smaller effect than predicted. E) a hormone can exert its full effects only in the presence of another hormone 69. The pituitary hormone that controls hormone synthesis and release from the thyroid gland is A) TSH. B) ACTH C) FSH D) LH. E) STH 70. The link between a first messenger and a second messenger in a cell that responds to peptide hormones is usually A) cAMP B) cGMP C) adenylyl cyclase. D) a G protein. E) calcium

Explanation / Answer

65. Ca2+.

66. A second messenger appears in the cytoplasm.

These receptors initiate the signaling pathways and result in various targets.

67. ADH.

68. Hormones working together produce a larger effect than predicted.

The hormones like oxytocin.

69. TSH.

70. a G protein.

G protein is enzyme complex coupled to a membrane receptors.

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