Biology Forums - Study Force

Chemical substances secreted by cells into the extracellular fluids that travel through the blood and regulate the metabolic function of other cells in the body are called ________.
 
  A) enzymes
  B) antibodies
  C) hormones
  D) proteins

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(Question 2) Dave has discovered a new lipid-soluble hormone. Which of the following is true regarding this hormone?
 
  A) can be stored in secretory vesicles
  B) will be bound to a transport protein in the blood
  C) receptor will be located on the plasma membrane
  D) will likely act through a second-messenger system

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(Question 3) Explain why prolonged periods of reading tire the eye muscles and result in eye strain.
 
  What will be an ideal response

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(Question 4) Which of the following is NOT a category of endocrine gland stimulus?
 
  A) neural
  B) humoral
  C) enzymatic
  D) hormonal

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(Question 5) What is the pharyngotympanic tube and what is its purpose?
 
  What will be an ideal response

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(Question 6) The parathyroid glands respond to which type of stimulus?
 
  A) hormonal
  B) humoral
  C) neural
  D) positive

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(Question 7) Virtually all amino acid-based hormones exert their signaling effects through intracellular ________.
 
  A) nucleotides
  B) calcium
  C) deactivating ions
  D) second messengers

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(Question 8) Bisphenol-A ( BPA ) is an endocrine disruptor that can leach out of certain plastics. It disrupts the normal function of the endocrine system my mimicking estrogen.
 
  Which of the following explains how persistent small amounts of BPA in the body can have effects?
  A) lock-and-key
  B) up-regulation
  C) down-regulation
  D) half-life

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(Question 9) What two things does the ciliary body do?
 
  What will be an ideal response

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(Question 10) Normal development of the immune response is due in part to hormones produced by the ________.
 
  A) thyroid gland
  B) thymus gland
  C) adrenal medulla
  D) pancreas

1) C

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2) B

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3) Reading or other close work requires almost continuous accommodation, pupillary constriction, and convergence, which lead to tiredness of the eye muscles.

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4) C

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5) The pharyngotympanic tube links the middle ear cavity with the nasopharynx. Normally it is flattened and closed, but swallowing or yawning opens it briefly to equalize pressure in the middle ear cavity with external air pressure.

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6) B

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7) D

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8) B

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9) 1. Constriction of the ciliary muscle that is attached to the lens via the ciliary zonule causes the lens to change shape.
2. The epithelium of the ciliary body secretes aqueous humor.

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10) B

no worries, happy to help out