Passive transport is the movement of biochemicals and other atomic or molecular substances across cell membranes without need of energy input. On the other hand, active transport <span>is the movement of molecules across a cell membrane from a region of their lower concentration to a region of their higher concentration which needs energy input. </span>
Atoms are the smallest unit of matter. Atoms of isotopes of the same element contain the same number of protons.
<h3>What are isotopes?</h3>
Isotopes are atoms of the same element which have different numbers of neutrons but the number of protons and electrons remains same.
As the isotopes of the atom have the same number of protons, so, their atomic number will also be the same.
Thus, it can be concluded that atoms of isotopes of the same element contain the same number of protons.
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Answer:
Once released into the circulation, GH binds and activates the cell-surface GHR, as well as the related prolactin receptor in target tissues such as liver, muscle, bone, and adipose tissue
Explanation:
Direct effects are the result of growth hormone binding its receptor on target cells. Fat cells (adipocytes), for example, have growth hormone receptors, and growth hormone stimulates them to break down triglyceride and supresses their ability to take up and accumulate circulating lipids.
Mutation i believe it is mutation
Answer:
A)
Concentration of hemoglobin = weight of the hemoglobin / total volume of RBCs
Therefore,
weight of the hemoglobin = concentration of the hemoglobin x Total volume of RBCs
weight of hemoglobin = (8.7x 10⁻¹¹ x 0.34) g
= 2.96 x 10⁻¹¹ g
B)
molar mass of hemoglobin is 64500g/mol.
molar mass (m) = number of moles (n) x M,
∴ n = m/M
so number of moles in 2.96 x 10⁻¹¹ g of hemoglobin with molar mass 64500g/mole
= 2.96 x 10⁻¹¹ / 64500
= 4.5 x 10⁻¹⁶ moles
using Avogadro’s number to calculate the number of molecules from moles.
1 mole = 6.022 x 10²³ molecules
so, 4.5 x 10⁻¹⁶ moles
= 4.5 x 10⁻¹⁶ x 6.022 x 10²³
= 2.71 x 10⁸ molecules
Explanation:
Note: Average volume of a red blood cell = 87 μm³ = 8.7 x 10⁻¹¹ ml
The mean concentration of hemoglobin in red cells = 0.34g/ml.
