SA node has an unstable resting membrane potential.

The “resting membrane potential” of the sinus nodal fiber between discharges has a negativity of about −55 to −60 millivolts.

TLS Online TPP Program

#Id: 181

#Unit 5. Developmental Biology

Genetic specificity of induction:

mesenchyme may instruct the epithelium as to what sets of genes to activate, the responding epithelium can comply with these instructions only so far as its genome permits.

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#Id: 2570

#Unit 7. System Physiology – Animal

For a substance to be reabsorbed, it must first be transported

Across the tubular epithelial membranes into

the renal interstitial fluid and then

Through the peritubular capillary membrane back into the blood

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#Id: 2346

#Unit 3. Fundamental Processes

Sigma factor reduces the affinity for sequence independent binding and confers specificity for promoter.

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#Id: 8774

#Unit 1. Molecules and their Interaction Relevant to Biology

The Cp heat capacity of a defined system is the amount of heat (usually expressed in calories, kilocalories, or joules) needed to raise the system's temperature by one degree (usually expressed in Celsius or Kelvin).

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#Id: 3343

#Unit 6. System Physiology – Plant