Kuiz Sains Tambahan Tingkatan 5 Bab 1 Set 1

SELAMAT DATANG Kuiz Sains Tambahan Tingkatan 5 Bab 1 Set 1

Penyenggaraan Dan Kesinambungan Hidup (English)

KUIZ INI MENGANDUNGI 10 SOALAN

What is the unique feature of the first cervical vertebra, known as the atlas, that allows for the nodding motion of the head?

It articulates with the skull and lacks a centrum.

It has a long, downward-pointing spinous process.

It has a prominent odontoid process.

It has a large, thick centrum to support the skull.

None

What is the main driving force behind the process of ultrafiltration in the glomerulus?

Osmotic pressure created by proteins in Bowman’s capsule.

The diffusion of water down its concentration gradient

Active transport of waste products into the nephron.

High hydrostatic pressure due to the differing diameters of afferent and efferent arterioles.

None

Which type of neuron is responsible for transmitting nerve impulses from the central nervous system to an effector like a muscle or gland?

Sensory neuron

Interneuron

Afferent neuron

Efferent neuron

None

The transmission of a nerve impulse across a synapse involves the conversion of signals. What is the correct sequence of this conversion?

Electrical signal to chemical signal to electrical signal

Chemical signal to mechanical signal to electrical signal

Chemical signal to electrical signal to chemical signal

Electrical signal to mechanical signal to electrical signal

None

The human skeleton is divided into two main parts. Which of the following bones belongs to the axial skeleton?

Sternum

Radius

Scapula

Femur

None

During hemodialysis, how are waste products like urea removed from the patient's blood?

They are filtered out using a high-pressure system similar to the glomerulus.

They are actively transported out of the blood by the dialysis machine.

They are chemically broken down by enzymes present in the dialysis fluid.

They diffuse from the blood into the dialysis fluid down a concentration gradient.

None

In the mechanism of blood clotting, what is the immediate role of thrombokinase?

It directly forms a plug at the site of the wound.

It converts prothrombin into thrombin in the presence of calcium ions.

It causes platelets to break down and release their contents

It converts fibrinogen into a mesh of fibrin.

None

What is the primary function of the myelin sheath that surrounds some axons?

To receive chemical signals from other neurons

To provide structural support to the cell body.

To synthesize neurotransmitters for the neuron.

To act as an insulator and speed up impulse transmission.

None

Which of the following best describes the cause of Alzheimer's disease as mentioned in the source material?

A progressive disorder caused by a lack of the neurotransmitter dopamine.

A genetic disorder affecting the myelin sheath, leading to muscle weakness

The formation of blood clots in the brain, leading to memory loss.

Shrinkage of brain tissue and reduced secretion of the neurotransmitter acetylcholine.

None

10.

Which of the following is NOT part of the appendicular skeleton?

Humerus

Vertebral Column

Clavicle

Pelvic Girdle

None

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