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Rina8888 [55]
3 years ago
8

Write down the sources and deficiency symptom of calcium ​

Biology
1 answer:
Nikolay [14]3 years ago
4 0

Answer:

Explanation:

Causes of hypocalcemia (calcium deficiency):

- Menopause

- Low levels of vitamin D

- hormonal imbalances (removal/overactivation of parathyroid)

- renal failures

Symptoms of hypocalcemia:

- Memory loss or confusion

- muscle spasms

- numbness/tingling in the extremities (hands, feet, face)

- brittle nails

- more prone to fractures

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vestigial (Basically the answer is B)

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<h3>yellowfish tuna</h3>

This is the fourth fastest fish, having recorded swimming speed of 76km/h.

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7 0
2 years ago
Please answer 5&amp;6. Thank you.
erastovalidia [21]

Answer:

5. The correct answer would be an option A. ova

Note: I assume that all the samples are of human origin.

DNA (deoxyribonucleic acid) content of somatic cells of humans consists of 46 chromosomes or 23 pairs of chromosomes. Gametes (sperm or ova) are haploid cells produced by the process of meiosis and contain half the number of chromosomes found in parent cell. Hence, they contain 23 chromosomes.

6. The correct answer would be an option J.

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Meiosis results in the formation of four haploid (n) cells from single diploid (2n) parent cell. Here, 2n is given as 8 so, n would be equal to 4.

Meiosis I results in the formation of two secondary spermatocyte cells (both haploid or 4 chromosomes in this case) from single primary spermatocyte (diploid or 8 chromosome in this case).

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3 0
3 years ago
The synapse is typically located between the _____ of the first (sending) neuron and the _____ of the second (receiving) neuron.
uysha [10]

Answer:

axon; dendrite

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A neuron has three main parts. These are axons, dendrites, and a cell body. Synapse is the site of communication between two neurons. The first neuron of a synapse is called the presynaptic neuron (sending neuron) while the second one is called the postsynaptic neuron (receiving). The axon of the presynaptic neuron and the dendrites of the postsynaptic neuron communicate with each other at the synapse as the axon of the first neuron delivers the nerve impulse away from the cell body.

Dendrites function as the receiving or input portions of a neuron. The plasma membranes of dendrites have numerous receptor sites for binding chemical messengers from the presynaptic neuron.

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