Podcast
Questions and Answers
What is the primary mechanism by which water molecules move across cell membranes?
What is the primary mechanism by which water molecules move across cell membranes?
- Osmosis driven by pressure gradients across semipermeable membranes
- Active transport using ATP as an energy source
- Simple diffusion driven by concentration gradients
- Facilitated diffusion through aquaporin channels (correct)
Which hormone is primarily responsible for regulating water reabsorption in the kidneys?
Which hormone is primarily responsible for regulating water reabsorption in the kidneys?
- Glucagon
- Cortisol
- Insulin
- Antidiuretic hormone (ADH) (correct)
In the context of water dissociation, what is the significance of the equilibrium constant (Keq) value of 1.8 × 10^-16 at 25°C?
In the context of water dissociation, what is the significance of the equilibrium constant (Keq) value of 1.8 × 10^-16 at 25°C?
- It suggests that water does not dissociate at all at 25°C.
- It indicates that water is a strong electrolyte at 25°C.
- It shows that water is a weak electrolyte and only partially dissociates at 25°C. (correct)
- It means that water dissociates completely into ions at 25°C.
What condition is characterized by an inability to concentrate urine due to a deficiency or insensitivity to antidiuretic hormone (ADH)?
What condition is characterized by an inability to concentrate urine due to a deficiency or insensitivity to antidiuretic hormone (ADH)?
If water is a weak electrolyte, what can be inferred about the concentration of hydrogen ions (H+) and hydroxide ions (OH-) in pure water at 25°C?
If water is a weak electrolyte, what can be inferred about the concentration of hydrogen ions (H+) and hydroxide ions (OH-) in pure water at 25°C?
Which of the following statements about osmosis is correct?
Which of the following statements about osmosis is correct?
Which of the following statements about aquaporin channels is correct?
Which of the following statements about aquaporin channels is correct?
What is the role of antidiuretic hormone (ADH) in water balance regulation?
What is the role of antidiuretic hormone (ADH) in water balance regulation?
Which of the following conditions is characterized by the inability to concentrate urine due to a deficiency or insensitivity to antidiuretic hormone (ADH)?
Which of the following conditions is characterized by the inability to concentrate urine due to a deficiency or insensitivity to antidiuretic hormone (ADH)?
Which of the following statements about weak electrolyte dissociation is correct?
Which of the following statements about weak electrolyte dissociation is correct?
Which of the following statements about osmosis is correct?
Which of the following statements about osmosis is correct?
Which of the following is responsible for regulating water balance in the body by controlling the reabsorption of water in the kidneys?
Which of the following is responsible for regulating water balance in the body by controlling the reabsorption of water in the kidneys?
In the context of weak electrolyte dissociation, what is meant by the term 'weak electrolyte'?
In the context of weak electrolyte dissociation, what is meant by the term 'weak electrolyte'?
What are aquaporin channels, and what is their role in osmosis?
What are aquaporin channels, and what is their role in osmosis?
What is diabetes insipidus, and how is it related to the regulation of water balance in the body?
What is diabetes insipidus, and how is it related to the regulation of water balance in the body?
