Which of the following hormones regulates blood calcium levels?

A. Parathyroid hormone

B. Growth hormone

C. Norepinephrine

D. Melatonin

Answer Explanation:

The parathyroid hormone (PTH) from the parathyroid glands is important in serum calcium regulation. It increases blood calcium levels by stimulating osteoclasts to break down bone and release calcium into the bloodstream. PTH also enhances the absorption of calcium from the intestines and the kidneys.

Therefore, the Correct Answer is A.

Q #1: in pea plants, green pod color (6) is dominant to yellow pod color ( A cross was done between a plant with green pods and a plant with yellow pods. Of the resulting offspring 50% had green pods and 50% had yellow pods. Which of the following were the genotypes of both parent plants?

A. Ggx Gg

B. GG x gg

C. Gg x gg

D. gg x gg

Answer Explanation

G

g

g

Gg

gg

g

Gg

gg
Q #2: Parasitic worm infestation is hypothesized to be damaging to the host. However, scientists have recently discovered that worm infestation can relieve the effects of certain autoimmune disorders, in which of the following ways should the hypothesis be modified, given the new findings?

A. Lack of worm infestations is the cause of some autoimmune disorders.

B. Worm infestation reduces the severity of certain autoimmune disorders

C. Worm infestation prevents the body from immune malfunction

D. Worm infestations exacerbate the body's immune reactions

Answer Explanation

The new findings can be used to generate a hypothesis to reflect the beneficial aspect of worm infestations in certain autoimmune disorders, indicating that they can help reduce the severity of the condition.
Q #3: A represents atomic mass and 2 represents an atomic number, which of the following describes an atom after a proton is emitted?

A. A-1,2-1

B. A-1,2+1

C. A,2-1

D. A+1,2-1

Answer Explanation

This is because when a proton is emitted from an atom, the atomic mass decreases by one unit, and the atomic number decreases by one unit. The atomic mass is the sum of protons and neutrons in the nucleus, and the atomic number is the number of protons in the nucleus. Therefore, if a proton is lost, both numbers decrease by one.

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Which of the following hormones regulates blood calcium levels?

More Questions on TEAS 7 Science

Q #1: in pea plants, green pod color (6) is dominant to yellow pod color ( A cross was done between a plant with green pods and a plant with yellow pods. Of the resulting offspring 50% had green pods and 50% had yellow pods. Which of the following were the genotypes of both parent plants?

Answer Explanation

Q #2: Parasitic worm infestation is hypothesized to be damaging to the host. However, scientists have recently discovered that worm infestation can relieve the effects of certain autoimmune disorders, in which of the following ways should the hypothesis be modified, given the new findings?

Answer Explanation

Q #3: A represents atomic mass and 2 represents an atomic number, which of the following describes an atom after a proton is emitted?

Answer Explanation

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