Final answer:
Quantitative measurements of physiological variables are body temperature and blood pH, as both can be expressed in numerical values. Gated-ion channel status and neurotransmitter type are generally qualitative.
Step-by-step explanation:
The measurements for physiological variables that are quantitative are those that can be represented by numerical values and can have magnitude, size, or amount quantified. In the question provided:
- Body temperature is a quantitative measurement because it can be expressed in degrees Celsius or Fahrenheit.
- Blood pH is also a quantitative measurement as it indicates the acidity or alkalinity of the blood on a numerical scale.
Gated-ion channel status and neurotransmitter type are typically qualitative measurements. The status of ion channels (such as mechanically gated channels, membrane depolarization, membrane hyperpolarization, membrane invagination, and measurements of membrane potential) often involves describing the condition or state of the channels, rather than numerically measuring them. Similarly, the type of neurotransmitter is categorized based on its chemical properties or the receptors it binds to, which is qualitative data.