After traveling through the AV node, an electrical impulse travels to which of the following components of an effective cardiac conduction system?

A. Stratum basale:
The stratum basale, also known as the basal layer, is the deepest layer of the epidermis. It contains stem cells and keratinocytes that are actively dividing. These rapidly dividing keratinocytes are essential for the continuous renewal of the epidermis as they migrate upwards through the layers of the skin.

B. Stratum lucidum:
The stratum lucidum is a thin, translucent layer found only in thick skin areas such as the palms and soles. It lies between the stratum granulosum and the stratum corneum and does not contain rapidly dividing keratinocytes. Its primary role is to provide an additional barrier.

C. Stratum granulosum:
The stratum granulosum is where keratinocytes begin to die and form a layer of granules that contribute to the formation of the skin’s barrier. This layer is not involved in the rapid division of keratinocytes but rather in their maturation.

D. Stratum spinosum:
The stratum spinosum contains keratinocytes that are somewhat less actively dividing compared to those in the stratum basale. This layer provides strength and flexibility to the skin but is not the primary site of rapid keratinocyte division.

A. The plasma membrane is selectively permeable: The plasma membrane controls the movement of substances in and out of the cell, allowing certain molecules to pass while restricting others. This selective permeability is essential for maintaining the cell's internal environment and facilitating communication and transport.

B. The plasma membrane receptors are specialized lipids: Plasma membrane receptors are typically proteins or glycoproteins, not lipids. These receptors are involved in signaling and communication between cells and the external environment.

C. The plasma membrane is composed of a bilayer of protein molecules: The plasma membrane is primarily composed of a phospholipid bilayer with embedded proteins. The bilayer itself is made up of phospholipids, not proteins, which provide the basic structure and fluidity of the membrane.

D. The plasma membrane does not participate in cellular activities: The plasma membrane is actively involved in various cellular activities, including signal transduction, transport, and cell recognition. It plays a crucial role in interacting with the external environment and regulating cellular processes.